Method of shaping hollow metal articles.



J. F. LEWIS.

METHOD OF SHAPING HOLLOW METAL ARTICLES.

APPLICATION FILED JULY 1&1912.

1,062,719. Patented May 27,1913.

2 SHEETS-SHEET 1.

I WWMM J. P. LEWIS.

METHOD OF SHAPING HOLLOW METAL ARTICLES. APPLICATION FILED JULY 13,1912.

EfifiQfilQ. Patented May 27,1913.

2 SHEETS-SHEET 2 Fig ,6,

II II 27 amm/wto'a w-Mm Zewa and State of Pennsylvania, have invented.

consists in the detailsof construction and TENT OFFICE.

JOHN F. LEWIS, or 'PHILADELPHIA, PENNSYLVANIA.

METHOD OF SHAPING HOLLOW METAL ARTICLES.

Specification of Letters Patent.

Application filed July 13, 1912. Serial No. 709,120.

To all whom it may concern Be it known that I, JOHN F. LEWIS, acitizen of the United States, residing at Philadelphia, in the-county of Philadelphia new and useful Improvements in Methods of Shaping Hollow Metal Articles, of which the following is a, specification.

My invention relates to a new and useful method of shaping hollow metal articles, and has for its object to so utilize water as' to readily conform the article under treatment to the shape of the die without said article moving lengthwise of the die.

A further object of the invention is to fill the article to be shaped with water to seat the same so as to prevent the displacement of said water and to shorten said article by pressure upon one end thereof.

A still further object of the invention is to submerge the article tobe shaped in water with an open end up, inclo-sing said article in a die and shortening the same by' pressure upon the ends of the article.

With these ends in view, this invention combination of elements hereinafter. set forth and then specifically designated by the claims. v I 's In order that'those skilled in the art to which thisiinvention appertains may understand how to make and use the same, I will describe its construction in detail, referring by numeral to the accompanying drawing forming a part of this specification, in which- Figure 1 represents a portion of a press of any suitable construction having a reservoir bolster set thereon. adapted to carry the punch and provided with a die carried by the ram. Fig. 2 is a plan view of the reservoir bolster, showing the punch mounted therein Fig. 3 is an end view of.the die with the knock-out thereon. Fig. 4: is a side elevation of a shell creasing to be formed, and F'g."5 is a similar view of the finished In icarrying out my inventionas here embodied, 2 represents the frame of a press of any suitable design adapted to perform thew wo'rk ,provided with a bed plate 3, and having a ram 0n the bed plate of the press is mounted the reservoir bolster 5 having a water chamber 6 formed therein from which leads an opening 7 through the bottom of the reservoir bolster, and said reservoir bolster. is provided with an outer flange 8' intermediate the top and bottom thereof which rests upon the bed plate 3, and is held in vplaee--by dowel pins 9 or their equivalent which fit in holes 10 in the flange and other holes 11 in the frame of the ess.-

12 denotes the punch which may be of any desired shape or size having an opening therein and provided with an integral'bolt 14 which passesthrough the opening 7, the threaded yond the lower face of the reservoir bolster and having mounted thereon, a nut 16, for holding the punch in place. In order that the punch may always be placed in the same position, I provide a dowel pin 17 which hole 18 in the punch and another hole 19 inthe reservoir-bolster. On the rain of the press is mounted the die 20, the interior walls of which are produced in the shape desired for the exterior of the finished product, which in this particular case, is shown as the shell or casing of a grease cup, but of course it will be readily understood that I do not confine myself to the construction here shown as it is equally applicable to the manufacture of lmobs or terminals of bed or fence posts, door knobs and a great variety of other hollow metal. articles. The die is provided with a stem 21 which sits in the ram of the press, and runrping through said stem and the die to he interior of the latter, is a longitudinal opening 22 in which is slidably mounted the knock-out rod 23 carrying a knock-out plunger 24 which is fitted in the die.

Taking as an example, the shell or casing of a grease cup as here shown, the operation of the device is as follows: The water being maintained at the proper level, the-articles are placed in the liquid chamber and seated upon the punch 12 in alinement with the die 20 at which time, the water will run into the article through the u per open end and when the ram moves, 1; e articles will [enter the die and the continued downwardniovement of the ram will force the ends of the article toward one another PatentedMay27,1 913..

end 15 of said bolt extending be .shape of a portion of a sphere. With the upward movementof the ram, the cup will be withdrawn from the water chamber and at a predetermined time, the knock-out plunger 24 will be operated to forcethe fin- .ished article from the die.

By referring more particularly to the article shown in Figs. 4 and 5, 25 represents a blank having a' closed end on which is formed the axial stem 26 and to form this blank into the grease cup body .27, said blank is set with its open end upward upon the punch12, the stem 26 registering with the opening 13 in said punch, thus alining the blank with the die 20.. i

In the downward movement of the ram 4, the die 20 will pass over the blank and as soon as the upper end of the blank comesin contact with the upper wall of the interior of the die, further lengthwise movement of the blank within the die will be prevented and the further downward movement of the ram will force the ends of the blank toward one another thus shortening said blank which will cause the water therein to bulge that portion of the blank which is out of.

contact with any port-ion of the die and cause said blank to conform to the interior contour of said die, thereby forming the grease cup body 27.

It will be noted from this construction that an uninterrupted supply of the liquid is maintained in the liquid chamber, so that it will be unnecessary to fill each and every blank separately, but by placing said blanks in position upon the punch, the water will readily flow therein forcing out all of the air so that it will be impossible to have air bubbles in the blank which' would form an imperfect finished article.

Of course I do not wish to be limited to the exact details of construction as here shown as these may be varied within the limits of the appended claims without departing from the spirit of my invention.

Having thus fully described my invention,

what I claim as new and useful, is-

1. The method of forming hollow articles, consisting of filling a hollow article with liquid, seating it upon a surface with its open end upward and shortening said article by pressure upon the open endto cause its side walls to distend.

2. The method of forming hollow articles consisting of seating a hollow article upon a surface, filling it with liquid, and shortening said article by pressure upon the open end, thereby distending its side walls.

3. The method of forming hollow articles consisting of seating the closed end of a hollow article in a vessel filled with liquid,

so that said hollow article is filled with said liquid and shortening said article causing an increase in the diameter of its side walls. 4. The method of forming hollow articles consisting of submerging a hollow article in a liquid, seating the closed end, closing the open end, and shorteningthe same by pressure upon the open end.

5. The method of forming hollow articles, consisting of submerging the same,seating the closed endof said article upon a punch, so that the liquid will'be retained in said article, closing the open, end, and shortening 'the article by pressure on the open end.

6. The method of forming hollow articles consisting of submerging the same in a liquid, seating the closed end of said article upon a punch, so that the liquid will be retained in said article, closing the open end of the article with a die and shortening said article by pressure on the open end until the side walls of said shape of the die.

'7. Th herein described method of forming hollow articles consisting of submergmg an article in a liquid-contained in a receptacle, seating the closed end of said article upon a punch contained in the receptacle,

placing a die over said article,-clos1ng its open end and shortening said article by pressure on the open end.

8. The method of consistingof seating one of said articles which is of greater length than the finished article, ing the open end with a die, and. shortening said article by pressure upon the open end thereby causing the sides of said article to expand to the conformity of the die by the pressure of liquid 'within the article.

9. Themethod of forming hollow articles, consisting of seating the open end of one of said articles which is of greater length than the finished article upon a punch, placing a die over the open end of said article thereby closing said open end, and shortening said article by pressure upon the open end thereby causing the water contained in the article to increase the diameter of said article.

10. The herein-described method of forming hollow articles, consisting in placing one of said articles filled with a liquid upon a punch with the open end upward causing the liquid to be retained in the article, covering said article with a die whose upper end is'normally closed, and shortening said article by pressure uponits open end.

11, The'method of forming hollow metal filled with liquid, upon a punch, closarticle conform to the forming hollow articles,

v side Walls thereof at all points here the I shaped blank npon afsulface, third, placing In testimony whereof, I have hereunto afa die over said blank to close its open end fixed. my signature in the presence of two and retain the. liquid therein, and-lastly, apsubscribing Witnesses.

plying pressure to the open end to force the 7 ends toward one another and distend theI Witnesses:

WV. HAMILTON.ROSE,4 M. H. L0 REE.

JOHN F; LEWIS.

die does not engage the blank.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G," 

